Rezaul Karim (Bengali: রেজাউল করিম, Arabic: رضا الكريم) is a Bengali masculine given name of Arabic origin. It may refer to:

• Rezaul Karim (born 1902), Bengali lawyer and independence activist
• Mir Mohammad Rezaul Karim (1935–2005), Bangladeshi diplomat
• Rezaul Karim Hira (born 1942), Bangladesh Awami League politician
• A. K. Mohammad Rezaul Karim Tansen (born 1953), Bangladeshi politician
• Rezaul Karim Chowdhury (born 1953), Bangladeshi politician and Mayor of Chittagong
• A. F. Mohammad Rezaul Karim Siddique (1955–2016), Bangladeshi professor
• Rezaul Karim Bablu (born 1962), Bangladeshi politician
• Sheikh Mohammad Rezaul Karim (born 1962), Bangladeshi minister
• Rezaul Karim Rehan (born 1968), Bangladeshi footballer
• Syed Rezaul Karim (born 1971), Bangladeshi Islamic scholar and politician
• Rezaul Karim Liton (born 1980), Bangladeshi footballer
• Rezaul Karim Reza (born 1987), Bangladeshi footballer
• Rezaul Karim Mannan, Bangladeshi politician
• Rejaul Karim Laskar, Indo-Bengali politician